# Train the generator optimizer_g.zero_grad() fake_logits = discriminator(generator(torch.randn(100))) loss_g = criterion(fake_logits, torch.ones_like(fake_logits)) loss_g.backward() optimizer_g.step() Note that this is a simplified example, and in practice, you may need to modify the architecture and training process of the GAN to achieve good results.
class Discriminator(nn.Module): def __init__(self): super(Discriminator, self).__init__() self.fc1 = nn.Linear(784, 128) self.fc2 = nn.Linear(128, 1)
GANs are a type of deep learning model that consists of two neural networks: a generator network and a discriminator network. The generator network takes a random noise vector as input and produces a synthetic data sample that aims to mimic the real data distribution. The discriminator network, on the other hand, takes a data sample (either real or synthetic) as input and outputs a probability that the sample is real.
For those interested in implementing GANs, there are several resources available online. One popular resource is the PDF, which provides a comprehensive overview of GANs, including their architecture, training process, and applications.
# Initialize the generator and discriminator generator = Generator() discriminator = Discriminator()
import torch import torch.nn as nn import torchvision
The key idea behind GANs is to train the generator network to produce synthetic data samples that are indistinguishable from real data samples, while simultaneously training the discriminator network to correctly distinguish between real and synthetic samples. This adversarial process leads to a minimax game between the two networks, where the generator tries to produce more realistic samples and the discriminator tries to correctly classify them.
def forward(self, z): x = torch.relu(self.fc1(z)) x = torch.sigmoid(self.fc2(x)) return x
